458 SCIENCE PROGRESS 



Miscell. Coll., vol. ii. p. 449) the author discusses the occurrence 

 m the United States of remains of dolphins referable to 

 Schizodelphis, and likewise the affinities of Case's Priscodel- 

 phinus crassirostis. Lastly, we have a paper in the Bulletin 

 of the Harvard Museum (vol. lii. p. 65) on Dorudon serratus, 

 an extinct cetacean described many years ago by Gibbs, of 

 which the affinities are doubtful. To the Geological Magazine 

 for May Dr. C. W. Andrews contributed an account of a 

 restored skull of Progeuzlodon, one of the links connecting the 

 extinct creodont carnivora with the typical cetaceans. Reference 

 may here be made to a revised classification of the cetacea, 

 largely based on palaeontological evidence, by Mr. True, published 

 in the Proceedings of the American Phil. Soc. for 1908. 



Considerable morphological importance attaches to a paper 

 by Dr. F. Ameghino, published in vol. xvii. of the Anales of 

 the Buenos Aires Museum, on the scapular arch of edentates and 

 monotremes. It may be recalled that in the Zoological Society's 

 Proceedings for 1893 the present writer proposed a revision of 

 the names in general use for certain portions of the pectoral 

 girdle, suggesting that the avian and reptilian so-called coracoid 

 ought to be termed metacoracoid, while the name coracoid 

 should be restricted to the process bearing that name in the 

 higher mammals, and to the bone generally termed epicoracoid 

 in dicynodonts and monotremes. As the result of a comparison 

 of a number of both extinct and living types, Dr. Ameghino 

 is convinced that this nomenclature is the true one, and ought 

 in consequence to be generally adopted. 



A second paper by Dr. Ameghino in the same volume of 

 the Anales of the Buenos Aires Museum is devoted to the alleged 

 occurrence of remains of armadillos in the Oligocene of France 

 and Germany. In view of the opinions which have been 

 advanced as to the reptilian nature of these remains, which 

 consist mainly of the plates of the dermal head-shield, the 

 author states that he can no longer definitely assert that such 

 plates indicate the occurrence of armadillos in the European 

 Oligocene. At the same time, he refers to a figure of the 

 microscopic structure of one of these plates, published by Filhol, 

 which accords very closely with similar figures of recent 

 armadillo-plates, and differs markedly from that presented by 

 the plates of certain lizards. To settle the question, it is urged 

 that sections of the plates of the so-called Necrodasypus should 



